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NMSE (No Man's Save Editor)

[][dotnet]

NMSE is a free, open-source desktop application for editing No Man's Sky save files.<br> It supports every platform the game ships on - Steam, GOG, Xbox Game Pass, PlayStation 4, and Nintendo Switch - and handles each platform's unique file layout, compression, and encryption transparently.<br>

NMSE boasts the most complete set of editable items out of all available save editors.<br> You can see a set of thorough comparisons between the two most popular editors here.

Download Latest Release · [See The Website][website] · Report a Bug · Request a Feature <br> User Guide

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Latest Supported Game Version: 6.30 Xeno Arena (6.30.0.1)

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✨ Features

👨‍🚀 Player & Stats

Edit health, currency, units, nanites, quicksilver
Switch game mode and difficulty presets
Modify player state and galactic coordinates
Unlock words, glyphs, and discoveries
Full milestone and journey milestone editing
Edit multitool inventory, type, class, and seed

🏗️ Bases, Settlements & Companions

Edit base inventories and storage chests
Settlement stats, production, and perks
Edit corvette cache and salvage containers
Edit fishing inventories and cooking ingredients
Companion editing with creature builder

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🚀 Starships, Exocraft & Fleets

Edit starships with full inventory access
Change ship type, class, seed, and name
Corvette editing, part reverse lookup, export and import
Manage exocraft inventories and tech
Full freighter inventory editing and room listing
Manage frigate fleet stats and traits
Squadron pilot and ship editing

🗃️ Inventories & More

Visual inventory grid editor for every slot type
Drag-and-drop item management
Auto-stack items from exosuit/starship to freighter/chests/starship
Sort inventory
Import/export practically everything (cross-editor compatible)
ByteBeat music library editor
Recipe browser with full crafting trees
Raw JSON tree viewer for advanced editing
Export/import editor configuration profiles

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🌍 Multi-Language Support

NMSE is localised in 16 languages: English (UK), English (US), French, Italian, German, Spanish, Russian, Polish, Dutch, Portuguese, Latin American Spanish, Brazilian Portuguese, Simplified Chinese, Traditional Chinese, Japanese and Korean. Any help in making language support more natural is welcome!

🐧 Cross-Platform (via Wine)

While NMSE is a native Windows application, it runs on Linux and macOS via Wine compatibility layers. <br> An AppImage is available for Linux users from the releases page.

Guides are available for Wine, [Bottles][guide-bottles], [Whisky][guide-whisky], and [CrossOver][guide-crossover]. A native cross-platform version is planned.

📸 Screenshots

<table style="width: 100%; border-collapse: collapse; margin-bottom: 1em; margin-left: auto; margin-right: auto;"> <tr> <th style="width: 25%; text-align: center; padding: 8px;">Player</th> <th style="width: 25%; text-align: center; padding: 8px;">Inventories</th> <th style="width: 25%; text-align: center; padding: 8px;">Corvettes</th> <th style="width: 25%; text-align: center; padding: 8px;">Companions</th> </tr> <tr> <td style="padding: 8px;"><img src="docs/img/player-general.png" width="120"></td> <td style="padding: 8px;"><img src="docs/img/exosuit-cargo.png" width="120"></td> <td style="padding: 8px;"><img src="docs/img/corvette-parts.png" width="120"></td> <td style="padding: 8px;"><img src="docs/img/companions.png" width="120"></td> </tr> <tr> <th style="width: 25%; text-align: center; padding: 8px;">Fleet</th> <th style="width: 25%; text-align: center; padding: 8px;">Catalogue</th> <th style="width: 25%; text-align: center; padding: 8px;">JSON Editor</th> <th style="width: 25%; text-align: center; padding: 8px;">Localisation</th> </tr> <tr> <td style="padding: 8px;"><img src="docs/img/frigates.png" width="120"></td> <td style="padding: 8px;"><img src="docs/img/discoveries-product.png" width="120"></td> <td style="padding: 8px;"><img src="docs/img/raw-json-editor.png" width="120"></td> <td style="padding: 8px;"><img src="docs/img/localisation-japanese.png" width="120"></td> </tr> </table>

📥 Installation

Requirements

Windows 10/11 (64-bit)

Runs on .NET 10.0 Runtime - no install required for Windows (pre-packed).

Quick Start

Download the latest release from the Releases page
Extract the zip to a folder of your choice
Run NMSE.exe
Use File -> Open Save Directory to load your save files

💡 Tip: NMSE auto-detects your save file location for Steam, GOG, and Xbox Game Pass.

Linux & macOS

Wine based AppImage and DMG are available from the release page.<br> See the cross-platform guides for running NMSE via Wine:

🍷 Wine on Linux
🧴 [Bottles on Linux][guide-bottles]
🥃 [Whisky on macOS][guide-whisky]
✖️[CrossOver on macOS][guide-crossover]

📖 Documentation

| | | |---|---| | User Guide | How to use NMSE - panel by panel, feature by feature | | Developer Docs | Architecture, core logic, data layer, IO, models, and UI internals | | Contributing | How to contribute code, report bugs, and submit pull requests | | Code of Conduct | Community guidelines | | Support | How to get help |

🛠️ Building from Source

# Clone the repository
git clone https://github.com/vectorcmdr/NMSE.git
cd NMSE

# Restore and build
dotnet restore
dotnet build

# Run tests
dotnet test NMSE.Tests/
dotnet test NMSE.Extractor.Tests/

Requires: [.NET 10.0 SDK][dotnet] · Windows or cross-compilation via EnableWindowsTargeting

🗺️ Roadmap

[x] Full save file support (Steam, GOG, Xbox, PS4, Switch)
[x] 16-language UI localisation
[x] Wine compatibility scripts (Linux & macOS)
[X] Corvette build order optimizer
[X] Import support for NMS Model IO Tool
[ ] Native cross-platform UI (AvaloniaUI migration)
[ ] Base teleport reordering
[ ] Support for in-game archives
[ ] Starship/Multi-tool/etc. collection system
[ ] Community seeds library
[ ] Integrations with NMS Optimizer app

💖 Support the Project

If NMSE has been useful to you, consider supporting its development:

[][sponsor] [][kofi]

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Your support helps cover hosting, tooling, and the many hours of development and testing that go into each release.<br> Every contribution - big or small - is greatly appreciated. ❤️

📄 License

NMSE is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.

🤝 Acknowledgements

[Hello Games][hello-games] for creating No Man's Sky
The NMS modding and save editing community
All contributors and [sponsors][sponsor] who help make NMSE better

Contributors:

Made with ❤️ by [vectorcmdr][github-owner]

[][github-owner] · [][discord]

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NMSE

Install / Use

README